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A key signature is a group of sharps or flats placed at the beginning of each staff, immediately after the clef. It indicates the key of the music and shows which notes are consistently raised or lowered throughout the piece.
What is a key signature?
A key signature applies to every octave unless it is temporarily changed by an accidental or replaced by a new key signature later in the music. It allows composers to avoid repeating the same accidentals throughout a score.
Each major and minor key has its own characteristic key signature, making it an essential part of standard music notation.
How is a key signature used in piano playing?
Recognizing the key signature before you begin playing helps you prepare the correct scale, chords and finger patterns. It also reduces reading mistakes by showing which notes are consistently sharp or flat.
Understanding key signatures is one of the fundamental skills for reading music fluently and playing confidently in different keys.